Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 9 zadań z tego arkusza, razem 25 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Auxin-driven wall loosening and elongation (2).
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Dodaj cały arkusz do zestawuA pancreatic secretory cell contains the structures labelled Y in the schematic. (i) Distinguish between Y and the corresponding structures inside a mitochondrion. (ii) State one other organelle involved in exporting the proteins produced at Y.
Explain how you would prepare a temporary mount of a thin leek leaf epidermal peel and obtain a clear view of its cells with a light microscope.
(i) State the structural feature that allows some capillaries, such as those in endocrine tissues, to exchange dissolved substances particularly rapidly. (ii) Distinguish between the structures of a typical systemic artery and a vein of comparable external…
Two upright oat coleoptiles receive light from the left. A thin impermeable insert is placed just below the tip on opposite sides of P and Q. The diagram records their appearance before and after exposure. (i) Identify the directional response of Q. (ii)…
In darkness, ten similar oat shoot tips are placed on separate agar blocks. A different block is collected after each contact time shown. After its tip is removed, each block is placed on the right half of a freshly cut shoot. All treated shoots remain in…
Outline how ethylene can coordinate rapid ripening among neighbouring fruits.
A root meristem sample contains 240 cells. Its mitotic index is 0.30. Calculate how many of these cells are undergoing mitosis.
Distinguish between the final cellular products of mitosis and meiosis in a diploid flowering plant.
Foxgloves are hermaphroditic flowering plants. Discuss how these plants can generate genetically varied offspring.
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